Balbus may refer to:
- A cognomen of several ancient Romans; see Balbus (cognomen)
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- Theatre of Balbus, built by Lucius Cornelius Balbus the Younger
- Johannes Balbus (died c. 1298), Italian lexicographer
- Balbus, a character in The Apple Cart by George Bernard Shaw
- Mixophyes balbus, "Stuttering Frog" species
- ST Balbus, a Nigerian Government tugboat